Combustion-supporting device for introducing tin bath tail gas into kiln

Abstract

The utility model belongs to the technical field of float glass production equipment, and particularly discloses a combustion-supporting device for introducing tin bath tail gas into a kiln. The method and the device are used for solving the problem of energy waste caused by direct combustion and emission of BATH tail gas discharged from a VENTING outlet. The combustion-supporting device for introducing the tin bath tail gas into the kiln comprises a tin bath and a kiln combustion-supporting fan, an exhaust outlet is formed in the front end of the tin bath, an inlet of the kiln combustion-supporting fan is communicated with the exhaust outlet of the tin bath through an air pipe, and the distance between one end, away from the kiln combustion-supporting fan, of the air pipe and the exhaust outlet is 50-100 mm. And an adjustable baffle plate for keeping the pressure of the tin bath stable is arranged at one end, far away from the kiln combustion fan, of the air pipe. The BATH tail gas discharged from the VENTING outlet is introduced into the kiln through the kiln combustion fan, so that the BATH tail gas participates in combustion, the use amount of fuel in the kiln is reduced, and the purposes of saving energy and reducing consumption are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of float glass production equipment, in particular to a combustion-supporting device for introducing tin bath tail gas into a kiln. Background Art

[0002] In float glass production, the tin bath (BATH) is an essential thermal equipment. Glass is formed in the BATH, and a nitrogen-hydrogen mixture (of which hydrogen accounts for 5%-12%) is the BATH's protective gas, which is continuously introduced to maintain a slightly positive pressure. The small amount of hydrogen in the nitrogen-hydrogen mixture acts as a reducing gas to capture oxygen that penetrates into the BATH, thereby protecting the tin liquid from oxidation. The BATH exhaust gas (i.e., a nitrogen-hydrogen mixture, of which the hydrogen content accounts for approximately 4%-10%) is continuously discharged through the outlet curtain and the exhaust (VENTING) outlet. Of this, the nitrogen-hydrogen mixture discharged through the VENTING outlet accounts for approximately 50%. Currently, the BATH exhaust gas discharged through the VENTING outlet is directly burned and then discharged, resulting in energy waste. Utility Model Content

[0003] The purpose of the utility model is to provide a combustion-supporting device for introducing tin bath tail gas into a kiln, which effectively solves the problem of energy waste caused by direct combustion of BATH tail gas discharged through a venting outlet.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A device for introducing tin bath exhaust gas into a kiln combustion-supporting device comprises a tin bath and a kiln combustion-supporting blower. An exhaust outlet is provided at the front end of the tin bath. The inlet of the kiln combustion-supporting blower is connected to the exhaust outlet of the tin bath via an air duct. The distance between the end of the air duct away from the kiln combustion-supporting blower and the exhaust outlet is 50-100 mm. An adjustable baffle for maintaining the tin bath pressure stable is provided at the end of the air duct away from the kiln combustion-supporting blower.

[0006] Furthermore, the end of the air duct away from the kiln combustion-supporting blower is in the shape of a trumpet that expands outward.

[0007] Furthermore, the adjustable baffle is arranged at the trumpet-shaped port of the air duct.

[0008] Furthermore, the diameter of the air duct is 200 mm.

[0009] Compared with the prior art, the beneficial technical effects of the present invention are:

[0010] (1) The utility model connects the inlet of the kiln combustion-supporting blower with the venting outlet of the tin bath, thereby introducing the bath exhaust gas discharged from the venting outlet into the kiln through the kiln combustion-supporting blower, so that the bath exhaust gas participates in the combustion, thereby reducing the amount of fuel used in the kiln and achieving the purpose of energy saving and consumption reduction.

[0011] (2) The present invention provides an adjustable baffle at the trumpet-shaped port of the air duct, thereby facilitating the stabilization of the tin bath pressure. Since the hydrogen content of the bath exhaust gas discharged from the venting outlet is at most 12% (the rest is nitrogen), after it is added to the kiln combustion-supporting blower, the hydrogen content in the kiln combustion-supporting blower is less than 1%, thereby eliminating the risk of explosion. In other words, the present invention fully utilizes the bath exhaust gas discharged from the venting outlet of the tin bath while ensuring safety and stabilizing the tin bath pressure, without requiring additional power, thereby achieving the goal of energy conservation and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the connection structure of the present utility model.

[0013] Explanation of reference numerals: tin bath - 1; kiln combustion-supporting fan - 2; venting outlet - 3; air duct - 4; adjustable baffle - 5; kiln - 6; trumpet-shaped port - 7. DETAILED DESCRIPTION

[0014] Example 1: A combustion-supporting device for introducing tail gas from a tin bath into a kiln, such as Figure 1 As shown, it includes a tin bath 1 and a kiln combustion-supporting fan 2. The front end of the tin bath 1 is provided with an exhaust (VENTING) outlet 3. The distance between the VENTING outlet 3 of the tin bath 1 and the inlet of the kiln combustion-supporting fan 2 is less than 100m.

[0015] The inlet of the kiln combustion-supporting blower 2 is connected to the venting outlet 3 of the tin bath 1 via an air duct 4. In this embodiment, the diameter of the air duct 4 is 200 mm. In other embodiments, the diameter of the air duct can be adjusted according to the flow rate of the bath exhaust gas. It is worth noting that the air duct 4 is not directly connected to the venting outlet 3. The end of the air duct 4 away from the kiln combustion-supporting blower 2 is 50-100 mm away from the venting outlet 3. In addition, the end of the air duct 4 away from the kiln combustion-supporting blower 2 is equipped with an adjustable baffle 5 to maintain the tank pressure of the tin bath 1 stable.

[0016] Since the distance between the venting outlet 3 of the tin bath 1 and the inlet of the kiln combustion-supporting fan 2 is less than 100m, the BATH exhaust gas transportation between the venting outlet 3 of the tin bath 1 and the inlet of the kiln combustion-supporting fan 2 can make full use of the negative pressure at the kiln combustion-supporting fan 2 without the need to add an additional duct fan to provide power.

[0017] Furthermore, the end of the air duct 4, facing away from the kiln combustion-supporting blower 2, is flared outward in a trumpet shape to prevent the escape of bath exhaust gases. An adjustable baffle 5 is located at the trumpet-shaped end 7 of the air duct 4. Its location near the tin bath 1 facilitates adjustment by personnel working there. Because operating conditions are continuously stable, the position of the adjustable baffle 5 rarely needs to be adjusted again after a single adjustment.

[0018] The utility model uses the above device to introduce the BATH tail gas (nitrogen-hydrogen mixture) discharged from the venting outlet 3 into the kiln 6 through the kiln combustion-supporting fan 2, so that it participates in combustion, thereby reducing the fuel usage in the kiln 6 and achieving the purpose of energy saving and consumption reduction.

[0019] Since hydrogen accounts for a maximum of 12% of the bath exhaust gas discharged from the ventilation outlet 3 (the remainder is nitrogen), after adding this to the furnace combustion-supporting blower 2, the hydrogen content in the furnace combustion-supporting blower 2 is reduced to less than 1%, thus eliminating the risk of explosion. Therefore, the present invention fully utilizes the bath exhaust gas discharged from the ventilation outlet 3 of the tin bath 1 while ensuring safety and stabilizing the pressure of the tin bath 1, without requiring additional power, thereby achieving the goal of energy conservation and consumption reduction.

[0020] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A tin bath tail gas introduction kiln combustion-supporting device, comprising a tin bath and a kiln combustion-supporting blower, wherein the front end of the tin bath is provided with an exhaust outlet, characterized in that: The inlet of the kiln combustion-supporting fan and the exhaust outlet of the tin bath are connected through an air duct. The distance between the end of the air duct away from the kiln combustion-supporting fan and the exhaust outlet is 50-100 mm, and the end of the air duct away from the kiln combustion-supporting fan is provided with an adjustable baffle for maintaining the stability of the tin bath pressure.

2. The combustion-supporting device for introducing tin bath tail gas into a kiln according to claim 1, characterized in that: One end of the air duct away from the kiln combustion-supporting blower is in a trumpet shape that expands outwards.

3. The combustion-supporting device for introducing tin bath tail gas into a kiln according to claim 2, characterized in that: The adjustable baffle is arranged at the trumpet-shaped port of the air duct.

4. The combustion-supporting device for introducing tin bath tail gas into a kiln according to claim 3, characterized in that: The diameter of the air duct is 200 mm.

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